Sniper and Terminator X RSS Feed

While Sniper pre-dated Terminator X by several years, the two share so much of the same functionality that it made sense to group instruction for these two systems together.

Sniper / Terminator X Instruction

Sniper-Specific Instruction

Terminator X-Specific Instruction

Coming Soon!

Solving Holley Sniper High Idle Issues

Chris Myer 12/13/16 50

Introduction Ok, we have enough Sniper systems out there that I thought it would be a good idea to create a posting on challenges that might arise during installation. The broad consensus has been that the Sniper is an amazingly straight-forward inst...

Demystifying Holley Terminator and Sniper Ignition Hookup

Chris Myer 02/1/17 36

I recognize that the ignition control part of an EFI system can be the most intimidating part of the entire project. And most EFI System manufacturers seem to focus more on "how to connect it" than "how it works", so even after some folks get it wor...

Top 10 Sniper EFI Installation Tips from Holley's Tom Kise

Chris Myer 08/11/17 44

Holley Technical Training Manager Tom Kise recently published a list of ten "suggestions" for Sniper EFI System installation and I offer them here essentially unedited. While I have different insights on a few of the finer points this is all great i...

Solving RF Interference Issues in Sniper Installations

Chris Myer 05/25/17 18

In my experience the far majority of Sniper EFI customers never have a problem with radio frequency / electro-magnetic interference (RFI/EMI). However, a small percentage (about 10%) runs into this challenging gremlin. And when you do it can seem lik...

Holley Sniper EFI Installation Tips

Chris Myer 09/28/16 27

Required Texts for Holley Sniper EFI Installation Tips Ok, any decent course is going to require a few texts. The good news is that these don't cost you anything! If you don't already have them, Please download the following PDF files: Owners & Inst...

Improved Sniper / Terminator X Timing Control

Chris Myer 07/12/18 9

Introduction This article was originally written to describe how to improve ignition timing control on the Sniper EFI System. However, most of the information is directly applicable to Terminator X so we invite those owners to use this as well.Note 1...

Tuning Your Engine Start-Up

Chris Myer 02/8/21 10

Tuning Your Engine Startup How efficient is your engine startup? Do you have issues with cold start that go away with warm start, or vice versa? Let’s dig down into that a bit and see if we can help. I am going to write this specific to Holley’s Snip...

Sniper Software and Firmware Updates

Chris Myer 04/24/18 8

Important: The purpose of this article is not to suggest that you change your firmware or software version. After over 30 years in software and electrical engineering, I have learned never to upgrade any sort of software without good reason. If it'...

Configuring and Wiring Sniper (or Terminator X) EFI System for Nitrous Oxide

Chris Myer 10/10/18 9

Introduction This article was originally written to describe how to configure nitrous control into the Sniper EFI System. However, most of the information is directly applicable to Terminator X so we invite those owners to use this as well.As always,...

Holley Sniper EFI, Cost Effective, Easy to Install!

Chris Myer 11/18/15 67

You might think that EFI and vintage cars go together like engine oil and coolant. And I am the first to admit that there is something especially cool about a retro-rod that runs cleanly on a well tuned carburetor. But at some point the average owner...

Holley Sniper or Terminator X Stealth: A Buyer's Guide

Chris Myer 01/28/21 10

Sniper or Terminator X Stealth? Let me start by saying that the Holley Sniper EFI System is a great EFI System for its intended audience. If you’re looking to replace a carburetor with fuel injection then more than likely one of the various versions...

Tuning Sniper Progressive Link

Chris Myer 10/14/20 13

Sniper Progressive Secondary Link--A Great Solution for Abrupt Throttle! When folks install their new Sniper 4150, Super Sniper 4150, or Sniper XFlow on their high-horsepower engine, usually there are two reactions. First, “Wow, does this deliver so...

IAC Testing Procedures

Chris Myer 09/14/18 4

This article was originally written to describe how to test the IAC functionality the Sniper EFI System. However, most of the information is directly applicable to Terminator X so we invite those owners to use this as well.It is not uncommon to quest...

Adding Transbrake Control to your Sniper (or Terminator X) EFI System

Chris Myer 12/18/18 2

Introduction This article was originally written to describe how to configure transbrake control into the Sniper EFI System. However, most of the information is directly applicable to Terminator X so we invite those owners to use this as well.We rece...

Separating Mizu P25 Connectors

Chris Myer 10/26/17 5

If you have one of Holley's 3.5-inch Touch-Screen LCD displays you have already encoutered the Mizu P25 waterproof connector. This connector was designed specifically for low-voltage signals in the automotive, industrial, and consumer appliance indu...

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